HD6432633 Datasheet, PDF (1037/1453 Pages) Renesas Technology Corp – Series of Microcomputers (MCUs: microcomputer units)

Section 24 Power-Down Modes
24.1 Overview
In addition to the normal program execution state, the H8S/2633 Series has eight power-down
modes in which operation of the CPU and oscillator is halted and power dissipation is reduced.
Low-power operation can be achieved by individually controlling the CPU, on-chip supporting
modules, and so on.
The H8S/2633 Series operating modes are as follows:
(1) High-speed mode
(2) Medium-speed mode
(3) Subactive mode*
(4) Sleep mode
(5) Subsleep mode*
(6) Watch mode*
(7) Module stop mode
(8) Software standby mode
(9) Hardware standby mode
(2) to (9) are power down modes. Sleep mode and sub-sleep mode are CPU mode, medium-speed
mode is a CPU and bus master mode, sub-active mode is a CPU and bus master and on-chip
supporting module mode, and module stop mode is an on-chip supporting module mode
(including bus masters other than the CPU) state. Some of these modes can be combined.
After a reset, the LSI is in high-speed mode, with modules other than the DMAC and DTC in
module stop mode.
Table 24-1 shows the internal states of the LSI in the respective modes. Table 24-2 shows the
conditions for shifting between the power-down modes.
Figure 24-1 is a mode transition diagram.
Note: * This function is not available in the H8S/2695.
983